DOC: dot: Improve and add explanation in case `b` has only 1 dimension.
DOC: dot: Improve and add explanation in case `b` has only 1 dimension.

jorisvandenbossche/numpy,seberg/numpy,MSeifert04/numpy,charris/numpy,anntzer/numpy,tynn/numpy,WarrenWeckesser/numpy,endolith/numpy,grlee77/numpy,Eric89GXL/numpy,shoyer/numpy,rgommers/numpy,mattip/numpy,simongibbons/numpy,grlee77/numpy,WarrenWeckesser/numpy,anntzer/numpy,jorisvandenbossche/numpy,ahaldane/numpy,shoyer/numpy,pizzathief/numpy,MSeifert04/numpy,numpy/numpy,abalkin/numpy,pdebuyl/numpy,WarrenWeckesser/numpy,ahaldane/numpy,charris/numpy,rgommers/numpy,jorisvandenbossche/numpy,seberg/numpy,pbrod/numpy,pbrod/numpy,jakirkham/numpy,pizzathief/numpy,gfyoung/numpy,numpy/numpy,pdebuyl/numpy,Eric89GXL/numpy,mattip/numpy,anntzer/numpy,ahaldane/numpy,madphysicist/numpy,jakirkham/numpy,pizzathief/numpy,simongibbons/numpy,jorisvandenbossche/numpy,MSeifert04/numpy,MSeifert04/numpy,pizzathief/numpy,shoyer/numpy,WarrenWeckesser/numpy,gfyoung/numpy,charris/numpy,mhvk/numpy,ahaldane/numpy,simongibbons/numpy,rgommers/numpy,abalkin/numpy,madphysicist/numpy,anntzer/numpy,WarrenWeckesser/numpy,shoyer/numpy,mhvk/numpy,grlee77/numpy,MSeifert04/numpy,simongibbons/numpy,madphysicist/numpy,gfyoung/numpy,pdebuyl/numpy,numpy/numpy,charris/numpy,pdebuyl/numpy,jakirkham/numpy,shoyer/numpy,madphysicist/numpy,abalkin/numpy,mhvk/numpy,endolith/numpy,pbrod/numpy,pbrod/numpy,tynn/numpy,seberg/numpy,simongibbons/numpy,jakirkham/numpy,pizzathief/numpy,tynn/numpy,endolith/numpy,mattip/numpy,mhvk/numpy,Eric89GXL/numpy,mattip/numpy,mhvk/numpy,rgommers/numpy,endolith/numpy,seberg/numpy,madphysicist/numpy,jakirkham/numpy,pbrod/numpy,grlee77/numpy,grlee77/numpy,numpy/numpy,jorisvandenbossche/numpy,Eric89GXL/numpy,ahaldane/numpy